Harvey was with a group at Chelsea lounge The Gilded Lily when a fight broke out over a girl.

Sources said a friend of Harvey was involved in the fracas, but the pitcher — who was due at an MLB event a few hours later — stepped away from the melee and left.

A witness said, “Matt was there with friends when a fight broke out over a girl between someone in his group and another group at a nearby table. Matt was right there. Somebody lunged at him and his group, he stepped aside and left. Security broke things up.”

Hours later, Harvey, looking remarkably well rested, appeared at the MLB Fan Cave, where he addressed the controversy over his off-field activities.

His rep said of the lounge fight, “It was an unfortunate incident. He was in the wrong place at the wrong time.”

A Mets rep added, “Matt was not involved in any altercation. Those who were, were escorted out of the venue.”